farfli | 5941a4dbc6aae5539f0d67c48bf0bdf7808bd80030708acefd5e8ed7ec9e18fb

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
01/08/2026, 14:05

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General

Target
2026-08-01_3795a4c8da070399129eab48f3b74c2a_elex_wannacry.exe
Size 91KB
Sample260801-rd2mdaxfqa
SHA256 5941a4dbc6aae5539f0d67c48bf0bdf7808bd80030708acefd5e8ed7ec9e18fb
MD5 3795a4c8da070399129eab48f3b74c2a
SHA1 6480658b0fefa95372a0e52156972a3a07b8f2e4
SHA512 a4496fd2c5d6a441d68d2c20c31aab9946eb85e2f99ef1de277a2bcc5d6bab1b9d895b3cdf89d626db4e2e76c29cd0afe3e1f572e907fc95a973e12e2597451f
SSDEEP 1536:TSSABNx6vb4RoI47zzzzzzzzzvfxzVzNrzzzgzzzzzzzzzzzzzzzz6zzzdzzzzlB:eSABNx6vb4RoI4pyjHYLhal01UoPX+h0
TLSH
T10C93BE076BA948C9F2217D30556E373187BFA85D3F1457979348EE4EA437D80EC3628A
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

backdoor bootkit discovery execution farfli persistence spyware stealer

Malware Config

Signatures

Family: Farfli
Farfli is a Windows backdoor written in C++.
backdoor farfli

Detects Farfli Backdoor 4 IoCs

resource	yara_rule
behavioral1/memory/552-10-0x0000000010000000-0x0000000010032000-memory.dmp	family_farfli
behavioral1/memory/552-11-0x0000000010001000-0x0000000010021000-memory.dmp	family_farfli
behavioral1/memory/552-12-0x0000000010000000-0x0000000010032000-memory.dmp	family_farfli
behavioral1/memory/552-13-0x0000000010001000-0x0000000010021000-memory.dmp	family_farfli

Detects executables containing base64 encoded User Agent 2 IoCs

resource	yara_rule
behavioral1/memory/552-10-0x0000000010000000-0x0000000010032000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent
behavioral1/memory/552-12-0x0000000010000000-0x0000000010032000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_B64_Encoded_UserAgent

Badlisted process makes network request 8 IoCs

Network request originating from process or tool commonly abused by malware.

flow	pid	Process
4	552	rundll32.exe
5	552	rundll32.exe
6	552	rundll32.exe
11	552	rundll32.exe
26	552	rundll32.exe
42	552	rundll32.exe
75	552	rundll32.exe
85	552	rundll32.exe

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral1/files/0x0008000000024565-8.dat	acprotect

Deletes itself 1 IoCs

pid	Process
2584	yupqi.exe

Executes dropped EXE 1 IoCs

pid	Process
2584	yupqi.exe

Loads dropped DLL 1 IoCs

pid	Process
552	rundll32.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2370214745-1838013427-2987045292-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\obzme\\tlcns.dll\",DoVirusScan"	rundll32.exe

Enumerates connected drives 3 TTPs 23 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PHYSICALDRIVE0	rundll32.exe

Executes a command shell one-liner 1 TTPs 1 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
952	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-08-01_3795a4c8da070399129eab48f3b74c2a_elex_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	yupqi.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
952	cmd.exe
1292	PING.EXE

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	rundll32.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1292	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
552	rundll32.exe
552	rundll32.exe
552	rundll32.exe
552	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	552	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
372	2026-08-01_3795a4c8da070399129eab48f3b74c2a_elex_wannacry.exe
2584	yupqi.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 372 wrote to memory of 952	372	2026-08-01_3795a4c8da070399129eab48f3b74c2a_elex_wannacry.exe	84
PID 952 wrote to memory of 1292	952	cmd.exe	86
PID 952 wrote to memory of 2584	952	cmd.exe	87
PID 2584 wrote to memory of 552	2584	yupqi.exe	88

C:\Users\Admin\AppData\Local\Temp\2026-08-01_3795a4c8da070399129eab48f3b74c2a_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-08-01_3795a4c8da070399129eab48f3b74c2a_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:372
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\yupqi.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-01_3795a4c8da070399129eab48f3b74c2a_elex_wannacry.exe"
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:952
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 2
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1292
- - \??\c:\yupqi.exe
    c:\yupqi.exe "C:\Users\Admin\AppData\Local\Temp\2026-08-01_3795a4c8da070399129eab48f3b74c2a_elex_wannacry.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2584
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\obzme\tlcns.dll",DoVirusScan c:\yupqi.exe
      4⤵
      Badlisted process makes network request
      Loads dropped DLL
      Adds Run key to start application
      Enumerates connected drives
      Writes to the Master Boot Record (MBR)
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:552

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Windows Command Shell

T1059.003

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

yupqi.exe

Path C:\yupqi.exe
Size 91KB
SHA256 643d39c6aced28b2294f594c8a12490b01bf05e5848ec76de4a203c24234d33e
MD5 c435747f0a496ac543d70a9938acc7e7
SHA1 8377fe1d65abe5575b7422da1dcb2f972683d7a7
SHA512 acfc6251275191a1603b0c242da873c3c721452462ac4d13265c520ca3af9aacd4c6e718abcffba846a44a08b70d6efdf143e0f9f94375543d0cbdde92248674
SSDEEP 1536:TSSABNx6vb4RoI47zzzzzzzzzvfxzVzNrzzzgzzzzzzzzzzzzzzzz6zzzdzzzzll:eSABNx6vb4RoI4pyjHYLhal01UoPX+hE
TLSH
T11E93BE03ABA949C9F1217D30566E3B3187BF985D3F1457979348EE4E9437D80EC3628A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

tlcns.dll

Path \??\c:\obzme\tlcns.dll
Size 50KB
SHA256 b2d21c40c5bfc0f7695945946fa1cdd4eaf2f66a8391ddde6307c5f765fbf525
MD5 cbfc06794d16ace6adf42210183fc1b9
SHA1 74fc68a2af225b0aca954b3684940747511013c5
SHA512 181dbe8b63e28a81cb8e0b7240df8745da350e1ab433b157b8b4fd36aa10f0782e807c09563bcffe37cfe64aa1b514b2cc1f179fbcba422d96867179d88e13c9
SSDEEP 768:Z+arYIR3u5v4bGwCl56LNQQe5JBtGf1oTYtx/qQvorLOpqPJ/UP2Gy+OIudD05:ZPrG57TzDxJS6Etx/Zv2OwSy+OIOD05
TLSH
T15733F1ACE2F064F5D0AF6B345952225CF5C26F238D3190DB4A8214BF3C32A5B5B5E721
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/372-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/372-2-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/552-10-0x0000000010000000-0x0000000010032000-memory.dmp

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memory/552-11-0x0000000010001000-0x0000000010021000-memory.dmp

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memory/552-12-0x0000000010000000-0x0000000010032000-memory.dmp

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memory/552-13-0x0000000010001000-0x0000000010021000-memory.dmp

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memory/2584-7-0x0000000000400000-0x0000000000417000-memory.dmp

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